Adahuesca is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is located in the comarca of Somontano de Barbastro, in the foothills of the Sierra de Guara.
The municipality has a small population, recorded as 172 inhabitants in the 2018 census (INE). Its economy has traditionally been based on agriculture, particularly the cultivation of olives and grapes, and it lies within the Somontano wine-producing region.
Adahuesca is known for its historic centre, which includes the parish church of San Pedro and the remains of a medieval castle. The surrounding area is popular for hiking and canyoning, as it lies near the Sierra de Guara Natural Park.